LG CineBeam PF510QC Owner's Manual page 102

[LG Sound Sync]
(Q. Settings) →
By setting this feature to [On], you can adjust the volume of the connected LG Sound
Sync device using a projector remote control.
• If the auto-power feature of the sound bar that supports LG Sound Sync is set
to On, the sound bar will be turned on or off together when the projector is
turned on or off.
→ [Sound] → [Advanced Settings] → [LG Sound Sync]
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